package cn.practice.chat.utils;


import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtil  implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        if (SpringContextUtil.applicationContext == null) {
            SpringContextUtil.applicationContext = applicationContext;
        }

    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //根据name
    public static Object getBean(String name) {
        System.out.println(applicationContext.getBeanDefinitionNames());
        return getApplicationContext().getBean(name);
    }

    //根据类型
    public static <T> T getBean(Class<T> clazz) {
        System.out.println(applicationContext.getBeanDefinitionNames().toString());
        T t = getApplicationContext().getBean(clazz);
        return t;
    }

    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}
